Defensive publication

ABSTRACT

A SOLID STATE WATCH DISPLAY COMPRISES A DISPLAY MOUNTED TO THE SLOPING FACE OF A SOLID STATE WATCH. THE DISPLAY INCLUDES A REFLECTOR MOUNTED ALONG THE SLOPING FACE OF THE WATCH, A TRIANGULAR PRISM WITH THE HYPOTENUSE OF THE TRIANGLE ADJACENT TO THE REFLECTOR, A POLARIZING FILTER ADJACENT TO THE VERTICAL FACE OF THE PRISM AND A LIQUID CRYSTAL CELL BETWEEN SAID POLARIZING FILTER AND AN OUTER POLARIZING FILTER. THE LIGHT ENTERS THE PRISM THROUGH THE UPPER   HORIZONTAL FACE THEREOF, AND IS REFLECTED OUTWARDLY THROUGH THE VERTICAL FACE OF THE PRISM. THE LIGHT PASSES TWICE THROUGH POLARIZERS IN CONTRAST TO THE FOUR PASSES GENERALLY REQUIRED BY CONVENTIONAL FRONT ILLUMINATED DISPLAYS. THUS, THERE IS CONSIDERABLY LESS LOSS OF LIGHT WITH THE SUBJECT DISPLAY.

DEFENSWE PUBLlCATIGN UNITED STATES PATENT AND TRADEMARK OFFICE Publishedat the request of the applicant or owner in accordance with the Noticeof Dec. 16, 1969, 869 O.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series andarearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent and rademurk Office makes noassertion as to the novelty of the disclosed subject matter.

PUDLiSHED JULY 1, 1975 1936.004 SOLlD STATE WATCH DISPLAY Alon E.Willis, 122 Berrian Road,

tamford, 01m. 06%2 Filed .luiy 1, 1974-, Ser. No. 484,481 lint. Cl.(394!) 19/30 US. Cl. 58-50 R 1 Sheet Drawing. 9 Pages Specification Asolid state watch display comprises a display mounted to the slopingface of a solid state watch. The display includes a reflector mountedalong the sloping face of the watch, a triangular prism with thehypotenuse of the triangle adjacent to the reflector, a polarizingfilter adjaccnt to the vertical face of the prism and a liquid crystalceli between said polarizing filter and an outer polarizing filter. Thelight enters the prism through the upper horizontal face thereof, and isreflected outwardly through the vertical face of the prism. The lightpasses twice through polarizers in contrast to the four passes generallyrequired by conventional front illuminated displays. Thus, there isconsiderably less loss of light with the subject display.

